Impact Of Gamma-Irradiation On The Morphology And  Mitosis In Cluster Bean [Cyamopsis Tetragonoloba (L.) Taub.]

Girjesh Kumar; Shefali Singh; Radha Mishra

doi:10.48165/

Authors

Girjesh Kumar Plant Genetics Laboratory, Department of Botany, University of Allahabad, Prayagraj - 211 002, Uttar Pradesh (India)
Shefali Singh Plant Genetics Laboratory, Department of Botany, University of Allahabad, Prayagraj - 211 002, Uttar Pradesh (India)
Radha Mishra Plant Genetics Laboratory, Department of Botany, University of Allahabad, Prayagraj - 211 002, Uttar Pradesh (India)

DOI:

https://doi.org/10.48165/

Keywords:

Active mitotic index, Cyamopsis tetragonoloba, gamma rays, mutagen, TAB

Abstract

Induced mutagenesis is an important tool for crop improvement and gamma (γ) ray is one of the effective physical ionizing mutagens. The present pilot study was aimed to assess the effect of γ-irradiation on mitotic cells in cluster bean (Cyamopsis tetragonoloba (L.) Taub.). The seeds of cluster bean were treated with different doses of γ rays viz., 0, 100, 200, 300, 400 and 500 Gy to analyze the effect of γ-rays on meristematic root tips. Active mitotic index and total abnormality percentage were assessed. Increasing dose of γ rays negatively influenced AMI. Higher doses severely reduced germination and seedling height, although the initial dose of 100 Gy γ-irradiation significantly enhanced them as compared to the control. The irradiated seeds showed numerous chromosomal variations such as scattering, c-metaphase, bridge formation, etc. The evidences revealed that γ-rays have mutagenic effect at mitotic level and induced decline in mitotic activity and influenced the entity of chromosomal morphology. The study also revealed that lower doses of γ irradiation can be effective in agricultural endeavours.

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